Machine for manufacturing studs, nipples, and similar articles



May 19, 1925.

, F. N. Ross MACHINE FOR MANUFACTURING STUDS,

NLPPLES', AND SIMILAR ARTICLES Filed March 6, 1922 5 s'hqe'slsheet 1 y l mllermnuml-l-l-l iwi May'19, 1925.

' F. N. Ross MACHINE FOR MANUFACTURING .STUDSI'v NIPPLES, AN) SIMILR ARTICLES I 5 Sheets Sheet 2 Filed March 6, 1922 fitto/:Mulas May19,19z5. 1,538,659

F. N. ROSS MACHINE FOR MANUFACTURING STUDS, NIPPLES, AND SIMILAR ARTICLES Filed March 6, 1922 5i Smeg-'Sheet 3.

Suva/1to1 May l19, 1925.

I 1,538,659 F. N. Ross A MACHINE FOR MANUFACTURING SIfUDS, NIIPLES, AND SIMILAR ARTICLES Filed March e, 1922 5 sheets-sheet 4 May 19, 1925.

, 1,538,659 F. N. Ross MACHINE FOR MANUFACTURING STUDSl NIPPLES, AND SIMILAR ARTICLES Filed March 6, 1922 5 Sheets-Sheet 5 l kam: A

Patented May 19, 1925.

PATENT OFFICE.

FREDERICK N. ROSS,.OF DETROIT, MICHIGAN.

MACHINEFOR MANUFACTURING STUDS, NIPPLES, AND SIMILAR ARTICLES.

"Application led March 6, 1922.

To all whomz't may concern:

Be 1t known that I, FREDERICK N. Ross,

a citizen of the United States of America, residing at Detroit, in the county of Vayne and State ofMichigan,.have invented cer tain new and useful Improvei-n-ents in Machines for Manufacturing Studs, Nipples, andSimilar Articles, of which the following is a specification, reference being had therein to the accompanying'drawings.

The invention relates to machines for the manufacture of threaded pipe nipples, studs and similar articles, and it is the object of the Yinvention to obtain automatic means for successively performing upon a series of blanks the necessary operations for completing the saine. It is a further object to guard against the breaking `of `the dies or other cutters -whi-chare used andmto avoid throw-ing themaehine out of time in case of clogging. With these and "other objects in view the invention-consists in va rious features of `construction as hereinafter set forth.

In the drawings:

Figure 1 isv atop plan view of the machine;

Figure 2 is a side elevation thereof;

Figure is an endelevation;

Figure 4 is a sectional sideeleva-tion of the work feeding hopper; i

Figure 5 isa sectional elevation through the feeding wheel and work holding clamp;

Figure 6 is a cross-section through a portion of the hopper and wheel;

Figure 7 is a longi-tudinall section showing the driving mechanism for the cutters;

Figure 8 is a crossesection showing the same mechanism;

Figure 9 is. an elevation'fof'the work holding clamp.

In the manufacture of, studs, pipe nipples, etc., the stock is first cut to the proper length and is thenthreaded at opposite ends. The cutting of the stock will generally raise a burr adjacent to the cut which `must be removed. in the finished produ-ct, and it is also necessary to chamfer "theendsto avoid the raising of a burr by the threading operation.

Inasmuch as both` ends are threaded, these operations-must either `be successively performed or some means provided which Will hold'the work without interference with the operations at either end. My improved construction consists essentially of a means for alternately advancing and clamping the and; second, in cutting the threads.

Serial No. 541,607.

stock and performing on the stock, while in clamped position, the necessary machining operations. These, in the case ofthe manufacture of pipe nipples, consist; first, in removing theburr and chamfering `the ends, The construction is also such that the work when clamped is centrally held with sufficient clearance forithe operation Aof thetools upon each end thereof. Furthermore, provision is made for feeding and clamping blanks of various dimensions and for supplying the blanks to the feedingmeans from a hopper or holder.

In detail, A is a suitable .frame upon,

which is mounted the driving and cam shaft B. C is a gear, such, lfor instance as the well-known Geneva movement, for transmitting from the shaft B an intermittentl rotation to a parallel shaft D and for rigidly locking the shaft D from movement during its intervals of rest. Upon the shaft B is mounted the feedwheel E which is arrangedv between parallel and adjustable walls F, F forming a hopper for the blanks. The wallsA F and F are adju-stably mounted uponthe frame A so that theycan be moved nearer together or farther apart to correspond to the length of the nipples or studs to be placed in the-hopper. The end walls of the hopper are formed by inturned flanges G on the side walls F and F and the bottom of thehopper is -formed by the feed wheel E.

The feeding of the work isaccomplished by providing the periphery of the feed wheel E `with a series of pockets E', each of a size to receive one blank. Therefore, .as the wheel E is intermittently operated, `the blanks in engagement with the pockets will be moved-step by step and carriedout from the hopperto onesid'e thereof. At this side there is arranged a `clamping device comprising a shoe I-I which is mounted upona slidable rod I actuated by a cam J engaging roller bearings J thereon. The cam J is mounted on the. shaft yB and the shape of the cam and timing thereof is such that during theinterval in which the shaftv Dis stationary, the rod I will be actuated to press the shoe I-I against two of the blanks `that ranged in pairs on opposite ends of thecross bar E3 and between these lugs is a space for receiving the clamping shoe H. The sides of the hopper F and F are pro vided with channel bars F2 through which the blanks are guided in passing out from the hopper to a point for engagement with the shoe H.

The machining operations upon the blanks are performed in two successive posit-ions in which said blanks are clamped by the shoe H. In the first of these positions the removal Iof the burr and the chamfering of the ends of the blank is effected.; in the second position the threading operation is performed. For accomplishing these operations spindles K, K and L, L are arranged respectively in axial alignment with the work in the two positions of clamping. These spindles are mounted in house standards M, M on the frame A, which are preferably longitudinally adjustable upon said frame for different settings. The spindles K and K are driven by pulleys N mounted thereon and connected by belts (not shown) to any suitable source of power. The spindles L, L are driven through the medium of a4 step-down gearing O, O and a friction clutch P. This clutch is set at a proper tension by the pressure of the spring P so that in case of catching of the cutting tool on the spindle L, rotation of said spindle can be arrested, thereby avoiding breaking of the tool. f

To form the work, the spindles K, K, L, L are simultaneously moved axially so asto carry the cutters into engagement with the clamped work. As shown in Figure 9, the chamfering and burr rolling cutters Q are carried by the spindles K and K and the threading dies R by the spindles L and L. The axial advancement of these spindles is accomplished by levers S, S, S2,

S3 which are fulcrumed at one' end on brackets T, T, T2, T3 and have their Vopposite ends in engagement with cams U, U, U2, U3 on the shaft B. The levers are at tached to the spindles through the medium of suitable fork arms V and the cams are so fashioned that during the interval of rest of the shaft D and clamping of the shoe H, the levers S, S, S2, S3 are all simultaneously actuated to advance their corresponding spindles. Thus the spindles K, K Vwith their cutters Q will chamfer the ends of the blanks and remove the burr therefrom, while the spindles L, L with their threading dies R will cut threads on the opposite ends of the nipples.

As has been stated, the spindles L and L, are non-positively driven through the medium of the friction clutches I). There is also a non-positive connection for actuating these spindles longitudinally comprising the sprinU IV which is between lthe levers S2 and and a collar W on the spindle.

Therefore, if the threading die should catch, there is not only a stopping of the rotation of the spindle, but also a yielding of the spring W which prevents any longitudinal movement of such spindle. Therefore, the machine is not thrown out of time by any clogging of the work.

In operation, the wheel E having been adjusted with cross bars E3, *providing feed wheel E from movement. By the time that the shaft Bis again rotated the cutting tools have been withdrawn and the completed nipple will be released from the feed wheel while the chamfered .nipple will be Vadjusted into position for threading. The

continue automatically operation can thus,

and without interruption, unless there should be a clogging or catching of the tool.

In this event the defective nipple can be easily released 'and without exerting an stress which will break the die.

lVhat I claim as my invention is:

l. The combination of means for intermit tently advancing a series of cylindrical blanks, of a clamp successively engageable with the central portion of said blanks, a slidable member secured to said ,clamp having a cam follower mounted thereon, a cam engaging said follower for intermittently actuating said clamp, and a pair of longitudinally reciprocable rotary tools axially aligned with the blank engaged by said cla-mp.

2. The combination with means for intermittently advancing a series of cylindrical blanks, of a clamp engageable simultaneously with the central portions of a plurality of said blanks, a slidable memberseoured to said clamp vhaving a cam follower mounted thereon, and a vcam engaging saidgfollower for intermittently actuating said clamp.

3. The combination with means for intermittently advancing a series ofcylindrieal blanks, of means engageable with the central portion of said blanks for clamping the same at a plurality of points in their advancement during the int-erval of'rest and releasing the same during the advancement there of, rotary tools arranged in axial alignment with each clamped blank at opposite ends thereof, and means vfor simultaneously re loo ciprocating .all of 1said rotary tools into `and out of engagement with Asaid blanks during a the interval of rest.

,l the central portions thereof, means `for engaging said shoe with said blanks duringthe interval of 'rest to firmly clamp 'the latter' and release the same from the clam'ping'action during the advancement thereof, opposed rotary tools arranged in axial alignment with the clamped Lblanks at opposite ends thereof, and means .for reciprocating said tools into and out of engagement with the respective ends of the blanks during the interval of rest.

5. The combination with a rotary Wheel or drum having spaced outwardly extending peripheral flanges notched for the reception of cylindrical blanks, of means for intermittently rotating said Wheel to advance the blanks in engagement therewith, a shoe registering with the central portion of a blank in one position of ad-vancement for clamping the same, a cam for advancing said shoe to clamping position during` the interval of rest, a rotary pair of threading dies registering with the opposite ends clamped blank in axial alignment therewith, and means for reciprocating said rotary dies into and out of engagement with the blank during the interval of rest While said blank is rigidly clamped by said shoes.

(i. The combination with means for intermittently advancing a series of cylindrical blanks, oi' means for clamping said blanks at a predetermined point in their advancement during the interval of rest, a threading cut-- ter arranged in axial alignment with said blank While in clamped position, means for axially reciprocating said threading cutter into and out of engagement With the blank during the interval of rest, means for imparting rotary motion of the threading cut ter, and means permitting the yielding of both the rotary drive and the reciprocating means for said cutter to avoid injury thereto in case of clogging.

7. The con'ibination with arotary Wheel or drum having a transversely notched periphery, of means for feeding cylindrical blanks into engagement with the notches of said drum, means located at a. plurality of points in the advancement of said blanks for centrally clamping the same during the interval of rest, a plurality of rotary cutters arranged to axially align with the opposite ends of the clamped blanks, rotary spindles for carrying` said critters, means for positively driving one of said spindles, means for non-positively transmitting rotary move ment from said driven spindle to the other spindle, mea-ns ttor positively reciprocating the irst-n'ientioned spindle Ito move tihe saine into and out of engagement with the Work in registration there-With Aduring the interval of rest, and lnnrans for non-positively reciprocating the other spindle, whereby the ilatter is permitted to remain stationary {both as to rotation and reciprocation Iin caseof ologging. i

8. The combination with a frame, of a rotary shaft mounted thereon, a shaft arranged parallel thereto, a rotary idrum lon.

the latter 'shaft having transversely -arranged peripheral notches for receiving cylindrical blanks, a transmission Vbetiv-eendthe first and sec-ond `shafts for imparting to the latter alternate partial rotations and ifor locking the same from movement during the interval between said partial rotations, a clamping shoe for engaging a cylindrical blank in one position of advancement thereof, a cam on said continuously rotating shaft for actuating said clamping shoe during the interval of rest of the intermittently rotating shaft, a rotary tool in registration With the clamped blank, and means including a cam on said continuously rotating shaft for reciprocating said rotary tool into and out of engagement With the blank during the interval of rest.

9. The combination With a frame, of a shaft mounted thereon, a parallel shaft mounted on said frame, a rotary drum on the latter shaft provided With peripheral notches for receiving cylindrical blanks, a clamping shoe for engaging a blank in one position of advancement thereof to centrally clamp the same during the interval of rest of said rotary drum, a cam on said continuously rotating shaft for actuating said shoe, rotary tools axially aligned with the clamped blank at opposite ends thereof, spindles for carrying said tools, transversely extending levers for reciprocating said spindles into and out of engagement with the blank and cams on said continuously rotating shaft for actuating said levers.

10. The combination with a rotary drum, of 'a series of notched cross bars detachably secured to the periphery of said drum, said cross bars being exchange-able to provide larger or smaller notches, a hopper for receiving a series of cylindrical blanks arranged above said drum to permit said blanks to enter said notches, means for intermittently rotating said drum to advance the blanks in the notches thereof, means for clamping the blanks at a predetermined point in their advancement, and a rotary cutter' in axial alignment With the clamped blank adapted-to be moved into operative engagement therewith during the interval of rest.

11. The combination with a drum having a notched periphery, of plates parallelly arrangedl on opposite sides of said drum and adjustable towards or from the same, inwardly extending flanges on said plates forming thereof a hopper for the holding of cylindrical blanks of a length corresponding to the spacing between said plates, the bottom of said hopper being formed by said rotary drum, means for intermittently rotating said drum to advance the blanks in engagement with the notches thereof, means for clamping said blanks at one point in their advancement to hold the same stationary, and means for performing a machining operation on the clamped blank.

12. The combination of a rotary drum, notched cross bars `eXchangeably mounted upon the periphery of said drum and varying in length and the size of the notches, plates mounted on opposite sides of said drum and adjustable towards or from the same to correspond to the length of said notched cross bars, flanges projecting inward from said plates, forming' in connection therewith a hopper for receiving cylindrical blanks of a length corresponding to the spacing between said pla-tes, and means for intermittently rotating said drum to advance the blanks in engagement with the notches and to present additional notches for engagement with said blanks.

In testimony whereof I affixv my signature.

FREDERICK N. ROSS. 

